| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 6 | |
| #2 | France | 4 | |
| #3 | Sweden | 3 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | Norway | 2 | |
| #6 | United States | 2 | |
| #7 | Austria | 1 | |
| #8 | Australia | 1 | |
| #9 | Canada | 1 | |
| #10 | Denmark | 1 | |
| #11 | Italy | 1 | |
| #12 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Nails | |
| #2 | Unspecified technologies | |
| #3 | General building constructions | |
| #4 | Doors and windows | |
| #5 | Office furniture |
| # | Name | Total Patents |
|---|---|---|
| #1 | Offenbroich Adrian | 9 |
| #2 | Offenbroich A | 8 |
| Publication | Filing date | Title |
|---|---|---|
| DE10115238A1 | Clamp connector for detachable connection of profile pieces | |
| DE19817427A1 | Gripping connector for releasable connection between hollow sections | |
| CA2155746A1 | Clamping device | |
| DE4218842A1 | Clamping device | |
| DE4039421A1 | Clamp connection for two profiled sections - has bolt with hammer head, fitting into hole, with screw | |
| US3753583A | Expanding-type fastening device for detachable interconnection of hollow structural details | |
| US3731958A | Fastening devices |